Former world tennis champion Bobby Riggs is seen as he takes his vitamins and supplements as part of his training program for his match with Billie Jean King, Sept. 18, 1973. Riggs takes about 415 pills a day.

Former world tennis champion Bobby Riggs is seen as he takes his vitamins and supplements as part of his training program for his match with Billie Jean King, Sept. 18, 1973. Riggs takes about 415 pills a day.

Photo: Ed Kolenovsky, AP

Former world tennis champion Bobby Riggs is seen as he takes his... Photo-5101682.69018 - GreenwichTime

Image 3 of 18

Billie Jean King waves to crowds at the Astrodome in Houston on Sept. 20,1973 as she is borne onto the crowd on a multi-colored throne carried by four men for her match with Bobby Riggs.

Billie Jean King waves to crowds at the Astrodome in Houston on Sept. 20,1973 as she is borne onto the crowd on a multi-colored throne carried by four men for her match with Bobby Riggs.

Photo: Anonymous, AP

Billie Jean King waves to crowds at the Astrodome in Houston on... Photo-5101683.69018 - GreenwichTime

Image 4 of 18

Supporters of Billie Jean King are shown at the Astrodome in Houston, Tex., Sep 20,1973 as King will participate in a $100,000 winner-take-all "Battle of the Sexes" match against Bobby Riggs.

Supporters of Billie Jean King are shown at the Astrodome in Houston, Tex., Sep 20,1973 as King will participate in a $100,000 winner-take-all "Battle of the Sexes" match against Bobby Riggs.

Photo: Anonymous, AP

Supporters of Billie Jean King are shown at the Astrodome in... Photo-5101685.69018 - GreenwichTime

Image 5 of 18

Bobby Riggs, who calls himself an old man "with one foot in the grave" at 55, moves quickly to return a Margaret Court stroke as he easily defeated the 30-year-old Australian star at Ramona, Calif., May 12, 1973 in a winner-take-all, $10,000 match which he provoked. less

Bobby Riggs, who calls himself an old man "with one foot in the grave" at 55, moves quickly to return a Margaret Court stroke as he easily defeated the 30-year-old Australian star at Ramona, Calif., May 12, ... more

Photo: Wally Fong, AP

Bobby Riggs, who calls himself an old man "with one foot in... Photo-5101686.69018 - GreenwichTime

Image 6 of 18

Billie Jean King and Bobby Riggs smile during a news conference in New York to publicize their upcoming match at the Houston Astrodome, July 11, 1973.

Billie Jean King and Bobby Riggs smile during a news conference in New York to publicize their upcoming match at the Houston Astrodome, July 11, 1973.

Wimbledon Champ Billie Jean King holds down the net as Bobby Riggs, the 55-year-old tennis player who bested Margaret Court in a grudge match, jumps over the net in New York on July 11, 1973. King and Riggs announced that they will meet in similar $100,000 tennis match at a time and place as yet unannounced. less

Wimbledon Champ Billie Jean King holds down the net as Bobby Riggs, the 55-year-old tennis player who bested Margaret Court in a grudge match, jumps over the net in New York on July 11, 1973. King and Riggs ... more

Bobby Riggs strolls down Houston's main street, Sept. 13, 1973, with two of his "Bosom Buddies," members of a group of girls that will be cheering Riggs to victory in his upcoming match against Billie Jean King in the Astrodome. The "Buddies" are unidentified. less

Bobby Riggs strolls down Houston's main street, Sept. 13, 1973, with two of his "Bosom Buddies," members of a group of girls that will be cheering Riggs to victory in his upcoming match against Billie Jean King ... more

Billie Jean King tennis player in the "Battle of the Sexes" tennis match with Bobby Riggs, the 55-year-old veteran, at the Houston Astrodome in Houston, Texas on Sept. 20, 1973.

Billie Jean King tennis player in the "Battle of the Sexes" tennis match with Bobby Riggs, the 55-year-old veteran, at the Houston Astrodome in Houston, Texas on Sept. 20, 1973.

Photo: ASSOCIATED PRESS

Billie Jean King tennis player in the "Battle of the... Photo-5101691.69018 - GreenwichTime

Image 11 of 18

Mrs. Billie Jean King raises her hands in triumph as her Opponent, Bobby Riggs, prepares to hurdle the net following her straight-set victory over him in tennis match at the Houston Astrodome in Houston on Sept. 20, 1973. less

Mrs. Billie Jean King raises her hands in triumph as her Opponent, Bobby Riggs, prepares to hurdle the net following her straight-set victory over him in tennis match at the Houston Astrodome in Houston on ... more

Photo: Anonymous, AP

Mrs. Billie Jean King raises her hands in triumph as her Opponent,... Photo-5101693.69018 - GreenwichTime

Image 12 of 18

Bobby Riggs rides in a carriage pulled by women in his grand entrance to the Astrodome in Houston, Tx., for his $100,000 winner-take-all "Battle of the Sexes" match against Billie Jean King, Sept. 21, 1973.[

Bobby Riggs rides in a carriage pulled by women in his grand entrance to the Astrodome in Houston, Tx., for his $100,000 winner-take-all "Battle of the Sexes" match against Billie Jean King, Sept. 21, 1973.[

Photo: AP

Bobby Riggs rides in a carriage pulled by women in his grand... Photo-5101694.69018 - GreenwichTime

Image 13 of 18

Former world tennis champ Bobby Riggs, who had threatened to jump off a bridge if he lost his tennis match to Billie Jean King, settles for floating under the London Bridge at Lake Havasu City, Ariz., Oct. 10, 1973. He said he'd been warned he'd be arrested if he tried jumping. Riggs was beaten by Mrs. King in three straight sets in Houston's Astrodome. less

Former world tennis champ Bobby Riggs, who had threatened to jump off a bridge if he lost his tennis match to Billie Jean King, settles for floating under the London Bridge at Lake Havasu City, Ariz., Oct. 10, ... more

Photo: Anonymous, ASSOCIATED PRESS

Former world tennis champ Bobby Riggs, who had threatened to jump... Photo-5101695.69018 - GreenwichTime

Image 14 of 18

Bobby Riggs tries a new kind of tennis game - table tennis - with Billie Jean King during taping of a segment of TV's "The Odd Couple" in Hollywood on Friday, Oct. 20, 1973. Mrs. King defeated Riggs in three straight sets in their match at Houston's Astrodome. The outcome of the new game was not immediately known. less

Bobby Riggs tries a new kind of tennis game - table tennis - with Billie Jean King during taping of a segment of TV's "The Odd Couple" in Hollywood on Friday, Oct. 20, 1973. Mrs. King defeated Riggs in three ... more

Billie Jean King, center, surrounded by media Sept. 19, 1973 for a round of interviews and promotional work for the up coming match with Bobby Riggs, $100,000 winner take all match with Billie Jean King.

Billie Jean King, center, surrounded by media Sept. 19, 1973 for a round of interviews and promotional work for the up coming match with Bobby Riggs, $100,000 winner take all match with Billie Jean King.

Margaret Court of Australia, the world's greatest woman tennis player, is startled and smiling as Bobby Riggs (foreground) presents her with a bouquet of Red roses on May 13, 1973 just before the start of their celebrated match game at Ramona, Calif., May 13, 1973. Riggs then commented the gesture might "soften her up". He won, 6-2, 6-1. less

Margaret Court of Australia, the world's greatest woman tennis player, is startled and smiling as Bobby Riggs (foreground) presents her with a bouquet of Red roses on May 13, 1973 just before the start of their ... more